A Portable Device for A Portable Device for Real-time Sample Real-time Sample Flow MeasurementFlow MeasurementJerry Dulude, Glass Expansion, Inc.Jerry Dulude, Glass Expansion, Inc.

www.geicp.comwww.geicp.com

TruFlo Sample Uptake TruFlo Sample Uptake MonitorMonitor

Why Monitor UptakeWhy Monitor Uptake Clogged nebulizerClogged nebulizer Worn pump tubingWorn pump tubing Kinked sample capillaryKinked sample capillary Worn pump rollersWorn pump rollers Incorrect pressure of pump tubing clampIncorrect pressure of pump tubing clamp Faulty peri pumpFaulty peri pump

How it worksHow it worksThermal Flow MeasurementThermal Flow Measurement

Temp. Sensor B

Flow Rate is related to (TempA – TempB)

Heater

Temp. Sensor A

sample

Features of TruFloFeatures of TruFlo

Adjustable dampingAdjustable damping Settable alarm limitsSettable alarm limits Digital displayDigital display Recordable graphRecordable graph Range: 0.05 to Range: 0.05 to

5ml/min5ml/min

Setting Alarm RangesSetting Alarm Ranges

Pump rate vs flow rate & noisePump rate vs flow rate & noise

70 rpm60 rpm

50 rpm

40 rpm

30 rpm

Effect of Clamp PositionEffect of Clamp Position

¼ turn tighter at each arrow

Applications of TruFloApplications of TruFlo ICP-OESICP-OES ICP-MSICP-MS HPLC-MSHPLC-MS

Potential Applications of TruFloPotential Applications of TruFlo HPLCHPLC UV-VisUV-Vis FTIRFTIR Any technique where sample flow rate is importantAny technique where sample flow rate is important